Metal vein water jet mining method

Abstract

The invention discloses a metal vein water jet mining method. The metal vein water jet mining method comprises the following steps that S1, cutting is carried out along the boundary of an ore body and waste rock surrounding rock by adopting a water jet cutting assembly, and the ore body is separated from the waste rock surrounding rock; S2, a plurality of positioning holes distributed in an array are formed in the ore body; S3, the positioning holes serve as blast holes, an axial nozzle of the water jet cutting assembly is adopted to cut the periphery of the positioning holes to form at least one detonating seam, openings of the detonating seams communicate with the positioning holes, then the positioning holes are filled with explosive, the holes are sealed, a detonating cord is arranged, and detonating is carried out to enable the ore blocks to be peeled off; or the axial nozzle of the water jet cutting assembly is adopted to cut the slots, and the slots divide the ore body into a plurality of ore blocks; and a radial nozzle in the water jet cutting assembly is used for performing radial cutting on the bottoms of the slots, and stripping of the ore blocks is achieved; and S4, the peeled ore blocks are transported away from the working face. The mechanical degree is high, the ore dilution loss rate can be remarkably reduced, the ore extraction efficiency is improved, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to the mining of metal ore veins, in particular to a water jet mining method for metal ore veins. Background technique [0002] Thin and ultra-thin ore bodies of metal mines are usually mined by the comprehensive method and the room-and-pillar method. Due to the limitation of working conditions and mining methods, there are problems such as high waste rock mixing rate, high ore loss and dilution, and high ore bulk rate. transportation, ore dressing and other costs; in addition, harmful gases will be generated during blasting, and special ventilation operations are required, which is not conducive to the continuous operation of mining. Metal vein blasting has high efficiency, large capacity, and large output. The size and layout of blastholes are crucial to the power of explosives. A reasonable blasthole layout scheme can not only achieve safe and efficient mining of ores, but also significantly reduce mining. However, the existin...

AI Technical Summary

Problems solved by technology

[0002] Thin and ultra-thin ore bodies of metal mines are usually mined by the comprehensive method and the room-and-pillar method. Due to the limitation of working conditions and mining methods, there are problems such as high waste rock mixing rate, high ore loss and dilution, and high ore bulk rate. transportation, ore dressing and other costs; in addition, harmful gases will be generated during blasting, and special ventilation operations are required, which is not conducive to the continuous operation of mining

Metal vein blasting has high efficiency, large capacity, and large output. The size and layout of blastholes are crucial to the power of explosives. A reasonable blasthole layout scheme can not only achieve safe and efficient mining of ores, but also significantly reduce mining. However, the existing mining methods cannot avoid the above-mentioned problems, especially the degree of ore lumpiness cannot be controlled, and secondary blasting is required, which increases the workload

In particular, for the alpine and high-altitude areas, the ventilation during mining operations needs to increase oxygen and temperature before passing it into the working face. Ventilating and exhausting smoke will consume a large amount of air volume, which will virtually increase the cost of ventilation and thus increase the cost of mining. To a certain extent It also affects the working environment of personnel

Images